Flue for deep-frying equipment



June 9, 1953 H. L. HUDSON FLUE FOR DEEP-FRYING EQUIPMENT Filed March 20, 1950 JNVENTOR.- Hmm] LHUNSUN.

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-exhausted to the open air.

Patented June 9, 1953 UNITED STATES APATENT OFFICE.

l FLE'FOR DEEIZIITILG EQUIPMENT` l l i l l Harold L. Hudson, Toledo, ohio v Application March 20, 1950, Serial No. 150,743

This invention relates to ues for Waste gases fand vapors, and more particularly to bale units which may be-placed within such flues. Ordi- -narily,'1iues are used to conduct waste gases and 'vapors from cooking, baking and frying equiplment Within a building-the waste being carried `by the flue to the exterior-of the building, thence Many types lof cooking, frying, etc., entail the use of considerable quantities of oilsfats, 'and other condensable products, and these substances, when in vapor form, due to cooking temperatures involved, may be carried away by the air and steam normally present in the flue and discharged into the air as waste.

It is an object of this invention to provide a baffle unit which may be -placed in the path off vthe flow of the vwaste gases from a `cooking or' frying operationwhich will cause the condensation of a major part of the vapors carried by the flue.

Another object of this invention is to provide a reticulated lbaiiie unit Which will partially intercept the normal flow of gases and vapors in a flue and thereby create a turbulence within the mass of moving vapors in the iiue, vas an aid in the condensation of the vapors in the ue.

Another object of this invention is to provide a bafe unit which will present a primary condensing surface in one plane, a secondary vapor condensing surface placed in another plane, both condensing surfaces acting to stratify the flow of 1 Claim.` (Cl. 18S-51) vapors passing` therethrough to cause impingement of 'a major portion of the vapors on the conf zone or point of origin of the vapors for rec-lamation and further use.

Other objects and advantages of this invention relating to the arrangement, operation and function of the related elements of the structure, to various details of construction, to combinations of parts and to economies of manufacture, will beapparent to those skilled in the art upon consideration of the following description and appended claim, reference being had to the accom-r i panying drawings forming a part Iof this specification wherein like reference characters designate ycorresponding parts in the several views.

Referring to the drawings:

Fig. 1 is a plan view of 'a cooking unit hood and flue, parts being broken away todisclose a.

lbaffle construction embodying the invention herein;

Figr2 i-s a view on the line II-II, Fig. 1; Fig. 3 is a view on the line III-III, Fig. 2; and Fig. 4 is a view on the line IV--IV, Fig. 2. In the production of potato chips and like food products, the articles are deepfried, that is,

submerged for a period of time in a body 'of hot cooking oils which has a temperature well above the boiling point of water. Therefore; there is a 'constant flow of vapor from the kettles carrying tem condense on nearby lstructures giving the same an undesirable coating of grease.

The invention herein reduces the terminal loss of fat to such an extent, that the undesirable eX- terior coatings are practically eliminated with the inherent savings of reclaimed cooking media.

4 From the kettle region I0, the combined Water and-fatty vapors are normally directed through aperture I2 into hood I4, flowing in circuitous path therein to outlet I6 into a suitable stack.

The device herein is preferably placed to be disposed over the aperture l2 and comprises a rectangular frame I8 fabricated from angle iron forming an upper inwardly directed peripheral flange 20 with a depending skirt 22 thereaboutf.

A pair of slats 24 are welded to the upper face of the frame, one at each end thereof, providing overhangs to engage the structure on opposite sides of the aperture I2, thereby'providing a, supporting mount to suspend the frame for nesting within the aperture.

The frame I8 carries a screen 26 preferably attached to the under -side of the ange 20 and extending across the frame i8 to bridge the laper-l ture. This screen is of the expanded metal type and a desirable size comprises one fabricated from stock vapproximately g3g" thick and 'slit to provide 1/8 ribs and expanded to provide diamond shaped openings 28 in the neighborhood of by 15/8". This provides canted -bales or ribs having vanes or baie connections 29 of about 1A" width. In placing the screen 2'6 over the aperture l2, it is des-ired to have the cant upwardly toward the yclosed end 30 of the hood I l or directed away from the stack inlet It.

The vapors and fumes passing through the aperture l2 are thus stratied and directed toward the hood end 3'0 from where they have a reverse iiow to the stack.

This reverse or return ow is through a second screen 32 similar to the screen 26. This screen 32 is mounted in a rectangular frame 34 also of angle iron and ycanted about 45 upwardly toward the hood end 30. The contour vof the frame 34 is designed to the cross-sectional shape of the hood.

Inverted V-shaped brackets are provided to mount this frame 34 and comprise strips 3B attached to the upper faces of the slats 24 and provide seats 33 and supports 4l)` The screen 32- is placed to have the baiiles present a maximum surface to the ow of the vapors which is against the axis of the plane of the screen extent. This is also true of the screen 2B.

As the mixed fatty and water vaporsv flow from the aperture l2 through reticulated bae 26 the stream is broken, chilled, and directed toward the hood rear 39. A certain portion of' the fats condense thereon and drip back into the cooking units. The ow is reversed and travels through the mesh or lattice-work 32 where it is further vehilled' with a consequent `additional `condensation oi the fats which collect thereon into droplets D in turn falling yback into the cooking units. This combination of reverse flow and multiple screenings allows .only a very small portion of the fats to reach the atmosphere by Way of the stack, while the fiotv `interruption is insuicient to create any objectionable back pressure .or condense anyrnajor portion of the Water vapors.

The units are easily replaced, if necessary, yet

in action, they have proven to be Self-cleaning Within the ranges of temperatures normally used in food frying.

It is to be understood that the above detailed description of the present invention is intended todiselose van embodiment thereof to those 'skilled inthe art, but that the invention is not to be cor-istrued as limited in its application to the decarried out in various ways without departing from the spirit of the invention. The language having an L-shaped cross-section, one side of which provides a collar extending into said inlet from the'horizontal duct, the other side providing a seat in said horizontal duct about said inlet, a

pair of Opposing strap elements angularly extending upwardly from opposite portions of said seat,

'tails of construction and arrangement of parts p illustrated in the accompanying drawings,` since the invention is capable of ybeing practiced and a rst expanded met-a1 sheet in said seat forming a cover for said inlet, said sheet'including vanos directed to'eause the .flow of vapors therefr'ornin a ydirection away from said outlet, an' auxiliary frame seated onl said straps in an .angular posi.- tion above said Vfirst.expanded, metal sheetarrd a second expanded metal sheet carried by Said auxiliary frame, ysaid second expanded metal Sheet incl-udine Varies directed substantially rertically above Said @ist expanded sheet l References Cited Ythe file Qf'this patent UNITED STATES PATENTS Number Name Date 468,345 Hussey et al. Feb. 9, 11892 `1,299,423 Valentine Jan. "7', i919 '2 41,535,819 Emmet v Apr. '28, 1925 1,620,286- MeCarthyf Mar. 8, i927 1,895,642 Preble Jan. 31 1933 1,926,433 Cartmell- Sept. l2, 1933 2,493,726 ODay Jan. 3, 1950 i 2,494,146 Spanos Jan. l0, 1950 '2,532,420 Pled'ger Dec. 5, 1950 

